Equivalent linear and non-linear circuit model of superconducting microstrip normal and enhanced T-junction structures

• Published in: IET microwaves, antennas & propagation antennas & propagation, 2017-08, Vol.11 (10), p.1488-1492
• Main Authors: Mostaani, Abolfazl, Javadzadeh, S. Mohammad Hassan
• Format: Article
• Language: English
• Subjects: enhanced T‐junction structures; equivalent circuits; equivalent linear circuit model; FEM; finite element analysis; finite‐element method; fundamental harmonic outputs; harmonic balance method; method of moment; method of moments; microstrip lines; nonlinear circuit model; Research Article; scattering behaviour; SMT structures; superconducting microstrip normal T‐junction structures; superconducting microwave devices; S‐parameters; third‐order harmonic outputs
• ISSN: 1751-8725; 1751-8733; 1751-8733
• DOI: 10.1049/iet-map.2016.0484

In this study, an equivalent linear and non-linear circuit model of superconducting microstrip T-junction (SMT) structures is proposed. Two types of SMT structures are analysed using suggested model and their scattering behaviour is compared using both the method of moment and the finite-element method (FEM). The fundamental and third-order harmonic outputs are obtained using harmonic balance method to observe the non-linear behaviour in SMT structures. A linear and non-linear model for enhanced SMT structures is also suggested and verified by S-parameters comparison between the model and FEM method. The non-linearity in enhanced structures is modelled similarly and compared with results of normal structures.